General Information:
Chemical Formula:
(Ba,K)4(Na,Ca)3Ti3(Si2O7)(SO4)O4
IMA Status:
Approved IMA 1960
Physical Properties:
Cleavage:
[010] Perfect, [110] Perfect, [001] Distinct
Color:
brown or light yellow.
Density:
3.96
Hardness:
4.5-5
Luster:
Vitreous - Greasy
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